/*
 * Copyright (c) 2015-2020, Oracle and/or its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.tribuo.test;

import org.tribuo.Example;
import org.tribuo.Feature;
import org.tribuo.impl.ListExample;

import java.util.HashMap;
import java.util.Map;

/**
 * Test helpers
 */
public final class Helpers {

    private Helpers() {}

    public static Example<MockOutput> mkExample(MockOutput label, String... features) {
        Example<MockOutput> ex = new ListExample<>(label);
        Map<String, Integer> counts = new HashMap<>();
        for (String s : features) {
            counts.put(s, counts.getOrDefault(s, 0)+1);
        }
        for (Map.Entry<String, Integer> kv : counts.entrySet()) {
            ex.add(new Feature(kv.getKey(), 1d*kv.getValue()));
        }
        return ex;
    }
}
